About: The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis     Goto   Sponge   NotDistinct   Permalink

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Description
  • The Guacimal Pluton situated in the Cordillera de Tilarán in the NW of Costa Rica forms an oval-shaped body with an exposed surface of 60–70 km2. The pluton intruded into basic volcanic rocks of the Aguacate Group (Miocene–Pliocene) and is surrounded by a aureole of calc-silicate metasomatic rocks. The pluton is mainly formed by monzogranites to granodiorites, which strongly prevail over more basic types. The pluton was emplaced at depth of c. 3 km, crystallized at temperature of c. 760–800 °C under a relatively high oxygen fugacity (1.6–2.1 log units above the NNO buffer) and increased activities of volatiles (H2O, F) upon cooling. The prevailing, felsic rocks of the Guacimal Pluton are high-K calc-alkaline. Laser ablation ICP-MS dating of zircons from two granite samples yielded statistically identical U–Pb ages of 6.3 ± 0.5 and 6.0 ± 0.4 Ma, respectively. The Sr–Nd isotopic compositions are rather primitive (87Sr/86Sr6 = 0.70380–0.70413, e6Nd ~ +7.3 to +7.9).
  • The Guacimal Pluton situated in the Cordillera de Tilarán in the NW of Costa Rica forms an oval-shaped body with an exposed surface of 60–70 km2. The pluton intruded into basic volcanic rocks of the Aguacate Group (Miocene–Pliocene) and is surrounded by a aureole of calc-silicate metasomatic rocks. The pluton is mainly formed by monzogranites to granodiorites, which strongly prevail over more basic types. The pluton was emplaced at depth of c. 3 km, crystallized at temperature of c. 760–800 °C under a relatively high oxygen fugacity (1.6–2.1 log units above the NNO buffer) and increased activities of volatiles (H2O, F) upon cooling. The prevailing, felsic rocks of the Guacimal Pluton are high-K calc-alkaline. Laser ablation ICP-MS dating of zircons from two granite samples yielded statistically identical U–Pb ages of 6.3 ± 0.5 and 6.0 ± 0.4 Ma, respectively. The Sr–Nd isotopic compositions are rather primitive (87Sr/86Sr6 = 0.70380–0.70413, e6Nd ~ +7.3 to +7.9). (en)
Title
  • The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis
  • The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis (en)
skos:prefLabel
  • The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis
  • The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis (en)
skos:notation
  • RIV/00025798:_____/11:00000195!RIV12-MZP-00025798
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • V
http://linked.open...iv/cisloPeriodika
  • 1
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 209030
http://linked.open...ai/riv/idVysledku
  • RIV/00025798:_____/11:00000195
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • granitic rocks, geochemistry, mineralogy, zircon U–Pb age, Guacimal Pluton, Costa Rica, Central American Volcanic Arc (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • CZ - Česká republika
http://linked.open...ontrolniKodProRIV
  • [E42D8E6AC625]
http://linked.open...i/riv/nazevZdroje
  • Journal of Geosciences
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 56
http://linked.open...iv/tvurceVysledku
  • Janoušek, Vojtěch
  • Žáček, Vladimír
  • Mixa, Petr
  • Alvarado, Guillermo
  • Huapaya, Sofia
  • Košler, Jan
  • Ulloa, Andrés
  • Vondrovicová, Lenka
http://linked.open...ain/vavai/riv/wos
  • 000290046200005
issn
  • 1802-6222
number of pages
http://bibframe.org/vocab/doi
  • 10.3190/jgeosci.087
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